CPU Led on Asus Sabertooth 990FX R2.0

henriko · May 30, 2014

Hi, first I want to apologize for my bad english and any error or two that I may commit, so, I'm building my first setup, and I'm a little bit nervous and terrified because the CPU came off the motherboard TWICE, no, no pins missing or bend, but I can't turn the pc on, because of the god damn CPU_led, can someone explain me why? I've tried changing the RAM slot, nothing happens, tried resetting the BIOS, nothing, so, the last option is that my CPU or something else is DOA (I'm afraid of this)

PS: When i brought the RAM, it came out of a package or something else, just wound with paper, and when the man was packaging the RAM, those not so tiny fingers full of statis just touched the pins, maybe this is the cause?

Specs:
Asus Sabertooth 990FX R2.0 (ORLY?)
8GB Corsair DDR3 1866Ghz
FX-8350
Corsair TX650M
Geforce 9500 GT (just for a now)

nukemaster · May 30, 2014

How does the cpu come out of the motherboard. The locking lever should hold onto the pins pretty good.

Can you please confirm you locked the cpu in? If it is not, you may not get proper contact.

Also, how does an LED stop you from stating the system?

Onus · May 30, 2014

^That Asus board has four LEDs that show the status of different subsystems. They come on during POST, but should then turn off. If the machine won't boot, a LED still on indicates a problem with that subsystem: CPU, RAM, Boot Device, and I think the last is the Northbridge.
If the CPU LED stays lit, it may indeed not have good contact. Make sure no pins are broken or bent. Use only the minimal amount of thermal paste; some pastes are conductive and if they ooze out around the edges can short something.

henriko · May 30, 2014

Onus :

I'm using the stock cooler with stock thermal paste, not even a single drop in the edges :/

Onus · May 30, 2014

Are you certain it is a R2.0 board? Do you know what the BIOS version is? Be sure your CPU is supported without a BIOS update.

henriko · May 30, 2014

Onus :

I'll try to update the BIOS via USB

henriko · May 30, 2014

updated to the last version of the BIOS and still nothing :/

Onus · May 30, 2014

Hmmm, did you recheck for bent/broken pins?

henriko · May 30, 2014

Also, the motherboard is for sure R2.0

henriko · May 30, 2014

Onus :

Yep, not even a single pin missing or bent

Onus · May 30, 2014

Any difference if you take the mobo out of the case? Make sure nothing has gotten under it, like a stray screw, now trapped and shorting something.

henriko · May 30, 2014

Onus :

I've tested it out of my case, in a wooden table, but the damn red light still on :/

henriko · May 30, 2014

Since we are running out of ideas, i'll assume that the motherboard is defectuous and i'll try to replace it, thanks for the help, you guys are awesome!

Onus · May 30, 2014

Yeah, sad to say, it does sound like toast. The only idea I have left is to try another [older] CPU in it, if available.

henriko · May 30, 2014

Well, turns out that i was stupid enough to not connect the CPU properly on the motherboard, everything is fine now, sorry for wasting your time, and also thank you so much for the support! You are awesome!

nukemaster · May 30, 2014

Well better to get it working now without having it sent back and them tell you it was working all along.

Enjoy the new system.

Onus · May 31, 2014

Not connect properly? How so? Did it fit into the socket in an unusual way (i.e. not aligned) ?

henriko · May 31, 2014

Well, i really don't know how to explain what happened, the back part of the processor was slightly up, it indeed had some bent pins, but i fixed it and everything is now ok, and again, sorry for any error or two

Onus · May 31, 2014

Ok, cool.

krazykev101 · May 31, 2016

henriko :

Hi, first I want to apologize for my bad english and any error or two that I may commit, so, I'm building my first setup, and I'm a little bit nervous and terrified because the CPU came off the motherboard TWICE, no, no pins missing or bend, but I can't turn the pc on, because of the god damn CPU_led, can someone explain me why? I've tried changing the RAM slot, nothing happens, tried resetting the BIOS, nothing, so, the last option is that my CPU or something else is DOA (I'm afraid of this)

PS: When i brought the RAM, it came out of a package or something else, just wound with paper, and when the man was packaging the RAM, those not so tiny fingers full of statis just touched the pins, maybe this is the cause?

Specs:
Asus Sabertooth 990FX R2.0 (ORLY?)
8GB Corsair DDR3 1866Ghz
FX-8350
Corsair TX650M
Geforce 9500 GT (just for a now)

krazykev101 · May 31, 2016

ASUS tech support doesn't even help you, they just keep pushing you for an RMA. BUT THE REAL PROBLEM FOR ALL IS the 3 pin connector for the cpu . That's the culprit, You need to NEVER connect to the cpu power 3 pin female connector to the mobo 3 pin cpu fan male connector . You have to use the 3 pin female connector from the CPU on the 4 pin male connector just to the right of it on the MOBO called the cpu fan optional, it is a 4 pin male, but you use the 3 pin female cpu connector there and the embedded slot that places it in the right direction IS USED leaving 1 pin unused> so spread the word...the 3 pin male connector on the sabertooth FX990 is useless.

Onus · May 31, 2016

Closing necrotic thread.

CPU Led on Asus Sabertooth 990FX R2.0

Reputable

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Reputable

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Reputable

Reputable

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Reputable

Reputable

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Reputable

Reputable

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Reputable

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Reputable

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Commendable

Commendable

Titan

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